Medievalists.net : An aggregator website that features news, scholarly articles and video on a wide variety of Middle Ages topics. You will have to make sure a source you find here meets your acceptable source criteria.
Heroic Age Online Journal: An online peer-reviewed journal with scholarly articles about the Medieval period in Europe. All articles here meet your source criteria.
Gale Literature Resource Center: Our main database for critical essays on literature. You will need Larkin's password to access this from home.